Is Spicule Skincare Better Than Microneedling?

Korea has introduced countless skincare trends, from glass skin to next-gen SPFs, sheet masks, and toner pads. The latest grabbing everyone’s attention? Spicule skincare. We asked experts what it is, how to use it, and whether it's worth trying.

Spicules are microscopic, needle-shaped structures that make up part of the internal skeleton of marine sponges (phylum Porifera), explains Jane Yoo, M.D., M.P.P., board-certified dermatologist and Mohs surgeon, clinical assistant professor at the Icahn School of Medicine at Mount Sinai. Depending on the species, they’re made up of biosilica (hydrated silicon dioxide) or calcium carbonate. When used in beauty products, they're harvested, purified, and ground to a very fine, uniform particle size before being added to serums, essences, or patches. On the ingredient label, they are usually listed as “hydrolyzed sponge” or “sponge spicule.” Dr. Yoo adds, “They are often cited as a form of ‘liquid microneedling,’ although this is a misnomer.”

Good Housekeeping Institute Beauty Lab Director Sabina Wizemann explains that though spicules are naturally occurring, microscopic, rigid particles derived from the skeletons of freshwater or marine sponges, they can also be produced synthetically.

Unlike microneedling, spicules don't create controlled punctures that reach the dermis. Instead, they sit in the outer layers of skin and create temporary microchannels near the surface.

The biggest difference is how deep each treatment reaches, explains Dr. Yoo. Professional microneedling—whether mechanical or RF-assisted (RF stands for radiofrequency)—penetrates roughly 0.5 to 2.5 millimeters deep into skin, reaching into the dermis. That depth triggers a wound-healing response that impacts collagen and elastin. This is why microneedling is used to treat scarring, deep wrinkles, and significant changes in texture.

“Spicules act only at the epidermal surface,” Dr. Yoo says. “They don’t reach the dermis and don’t reliably trigger that same collagen-induction response. This is why I think of spicules as an absorption-enhancing exfoliant rather than a substitute for in-office collagen induction therapy.”

Another difference worth noting is that you always know the exact needle size during a microneedling treatment, but that’s not the case for spicules. “The brands I reviewed do not disclose the average length or diameter of their spicules, nor do they specify how deeply they penetrate the skin; some describe them in terms of concentration or overall strength,” Wizemann says.

One of the main perks is that they help other skincare ingredients and products absorb better. “The stratum corneum is designed to keep things out,” Dr. Yoo says. “By creating temporary microchannels, spicules briefly reduce that barrier function, giving water-soluble and larger-molecule ingredients (hyaluronic acid, peptides, growth factors, PDRN) a more direct path into the upper skin layers than they’d otherwise have. Brands cite large absorption-boost figures, but this may be somewhat exaggerated.”

Dr. Yoo shares the perks of spicule skincare products:

• Helps hydrating and active ingredients (hyaluronic acid, peptides, PDRN, centella) absorb more effectively
• Gently exfoliates for smoother-looking skin
• No needles or downtime
• Easy to use at home
• Can be gentle when paired with soothing ingredients

Overusing spicule products may weaken the skin barrier. “Because these tiny, needle-like particles aren’t something your skin normally encounters, your skin works to shed and remove them while repairing itself,” Wizemann says. “That repair process is part of why these products are thought to be effective. But if using them too often without giving skin time to recover, skin can become irritated, inflamed, and more sensitive, and its protective barrier may become compromised.”

Dr. Yoo explains the cons:

• Can cause redness or stinging
• May irritate sensitive skin
• Can damage the skin barrier if overused
• Shouldn't be combined with retinoids or exfoliating acids
• Independent research is still limited

Apply to clean, dry skin, and pat or press the product in rather than rubbing vigorously, as that helps the spicules do their job without excessive irritation, advises Dr. Yoo. Avoid the eye area and any broken or actively irritated skin. Follow with a soothing serum or moisturizer. “For frequency, I’d start most people at once or twice a week to gauge tolerance and only increase to two to three times a week if the skin handles it well without persistent redness or sensitivity,” Dr. Yoo says. “Skip layering it the same night as retinoids or chemical exfoliants.”

Yes! In fact, Dr. Yoo says it’s expected. “Most people feel a mild tingling or prickling for the first several seconds to about a minute as the spicules make contact with the skin,” she says. “That’s the sharp micro-structures physically stimulating nerve endings in the upper skin layer. It should be a brief, controlled prickle and not a burning or sharp sting that lingers, which would be a sign of irritation rather than normal spicule activity.”

Wizemann explains that spicules are tiny and rigid, and when lodged in the skin, they affect it mechanically, so we feel them as they press against our nerve endings in the outer layers of the skin.

Dr. Yoo recommends that those with active eczema, rosacea, dermatitis, a compromised skin barrier, or active, inflamed acne avoid spicules, or at minimum, do a patch test and check in with a dermatologist first. “I’d also avoid use on sunburned skin or skin that’s recently had a laser treatment or chemical peel,” she says. “And regardless of skin type, I don’t recommend combining spicules the same night with retinoids or alpha-hydroxy acid (AHA)/beta hydroxy acids (BHA) exfoliants—that’s stacking two exfoliating mechanisms at once, which raises irritation risk.”

Take note of the type of spicules, like hydrolyzed spicules, as well as the concentration, though concentrations are not uniform across brands. “I would also look for other ingredients the product has, such as proven ones like ceramides, peptides, and niacinamides, or others that make sense for my skin needs,” Wizemann says.

Spicules are a good example of the K-beauty phenomenon, which takes a clinical concept and turns it into a gentler at-home format. Dr. Yoo describes spicules as a smart way to enhance exfoliation, but they don’t go so far as to trigger collagen production. “It is not microneedling; it is a complement to a skincare routine and not a substitute for in-office treatment when the concern is scarring or significant structural aging,” she says. “The evidence base is still developing; most human data is limited to small studies.”

Celia Shatzman is the temporary beauty editor at Good Housekeeping and has covered beauty for 20 years, including all things skincare. She interviewed Jane Yoo, M.D., M.P.P., a board-certified dermatologist and Mohs surgeon, and a clinical assistant professor at the Icahn School of Medicine at Mount Sinai, for this story.

Good Housekeeping Institute Beauty Lab Director Sabina Wizemann contributed her expertise to the story. Since joining Good Housekeeping, she has researched, tested, and evaluated thousands of products for over a decade.